Scanning electrometer using the capacitive coupling in quantum Hall effect devices

Kawano, Y.; Okamoto, T.
February 2004
Applied Physics Letters;2/16/2004, Vol. 84 Issue 7, p1111
Academic Journal
We have constructed a scanning electrometer employing a quantum Hall effect (QHE) device. This technique uses capacitive coupling between sensor and sample to read out a change of longitudinal resistance of the sensor. This sensing mechanism was confirmed by measuring the magnetic field dependence of the readout signal and by an analysis based on a model of parallel-plate capacitor. Spatial mapping of Hall voltage profiles in the QHE state was demonstrated with this system. © 2004 American Institute of Physics.


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